{"id":"CVE-2026-45582","state":"PUBLISHED","title":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.","publishedAt":"2026-05-29T13:37:30.720Z","updatedAt":"2026-05-29T18:44:55.077Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["czlonkowski n8n-mcp"],"affected":[{"vendor":"czlonkowski","product":"n8n-mcp","versions":[{"version":"< 2.51.3","status":"affected"}]}],"references":["https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w","https://github.com/czlonkowski/n8n-mcp/pull/782","https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3"],"weaknesses":["CWE-201"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45582.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45582","state":"PUBLISHED","datePublished":"2026-05-29T13:37:30.720Z","dateUpdated":"2026-05-29T18:44:55.077Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-12T19:00:14.601Z"},"containers":{"cna":{"title":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","descriptions":[{"lang":"en","value":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3."}],"affected":[{"vendor":"czlonkowski","product":"n8n-mcp","versions":[{"version":"< 2.51.3","status":"affected"}]}],"references":[{"url":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w","name":"https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/czlonkowski/n8n-mcp/pull/782","name":"https://github.com/czlonkowski/n8n-mcp/pull/782","tags":["x_refsource_MISC"]},{"url":"https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f","name":"https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f","tags":["x_refsource_MISC"]},{"url":"https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3","name":"https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-201","lang":"en","description":"CWE-201: Insertion of Sensitive Information Into Sent Data","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-29T13:37:30.720Z"},"source":{"advisory":"GHSA-f3rg-xqjj-cj9w","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-29T18:44:38.040272Z","id":"CVE-2026-45582","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-29T18:44:55.077Z"}}]}}}